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A252237 as a simple table

na(n)
1858
23896
316056
443848
5215424
6932024
72568432
812882368
956984208
10157483872
11797509248
123566733728
139868152000
1450206873856
15225779393856
16624968085888
173187016753664
1814371363263104
1939789382386432
20203137189250048

[858,3896,16056,43848,215424,932024,2568432,
 12882368,56984208,157483872,797509248,3566733728,
 9868152000,50206873856,225779393856,624968085888,
 3187016753664,14371363263104,39789382386432,
 203137189250048]